The -cn switch disables control number lookup and updates in the trading partner database during inbound map runs.
Inbound maps.
EBF 4.2.4
CR#388842
The syntax for this switch is:
-cn
Disabling control number updates for inbound maps in Windows
Open the Run Inbound Map window.
Click the Option 2 tab.
Select No Control Number Updates.
The Validate Control Number Sequence option in the Option 2 tab of the ECMAP Run Inbound Map window is disabled when you select the No Control Number Updates option, as no validation can occur if no control numbers are being updated, and vice versa.
The same holds true for the corresponding command line switches, -sc and -cn. The switches cannot be used concurrently. See “Validating the Interchange (ISA) and Group (GS) control number sequence [EDI 4.2]”.
If you do not use -cn and -sc on the command line or if you do not select No Control Number Updates and Validate Control Number Sequence in Windows, the control numbers are updated to the database but are not validated.